21154720

素因数分解:

$2^5\times 5^1\times {\mathrm{109}}^1\times {\mathrm{1213}}^1$

素因数の和:1337

約数の個数: 48

約数和(自身を含む): 50478120

約数和(自身を除く): 29323400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 109, 160, 218, 436, 545, 872, 1090, 1213, 1744, 2180, 2426, 3488, 4360, 4852, 6065, 8720, 9704, 12130, 17440, 19408, 24260, 38816, 48520, 97040, 132217, 194080, 264434, 528868, 661085, 1057736, 1322170, 2115472, 2644340, 4230944, 5288680, 10577360, 21154720]

約数ペア:

[(1, 21154720), (2, 10577360), (4, 5288680), (5, 4230944), (8, 2644340), (10, 2115472), (16, 1322170), (20, 1057736), (32, 661085), (40, 528868), (80, 264434), (109, 194080), (160, 132217), (218, 97040), (436, 48520), (545, 38816), (872, 24260), (1090, 19408), (1213, 17440), (1744, 12130), (2180, 9704), (2426, 8720), (3488, 6065), (4360, 4852)]